Glenn tells me that he is often able to recognize aircraft by sight and even by sound. "Over the years aircraft recognizable by their sound include B737s and going way back to 1974, KC-135 stratotankers of the USAF."
This is the kind of skill that I personally find amazing. In a similar vein, I wish I was better at identifying birds. I do know a fair number of birds by sight, but am not able to recognize many by their calls.
Thanks again Glenn for participating in the project!
And here are the really nice Art Deco stamps he used:
By the way, my apologies to everyone for not being as diligent as I should be about posting the Penguins that have been sent back to me.